EP3046215B1 - Vorrichtung zur unterbrechungsfreien Stromversorgung für elektrische Mittelspannungsinstallationen im Außenbereich - Google Patents

Vorrichtung zur unterbrechungsfreien Stromversorgung für elektrische Mittelspannungsinstallationen im Außenbereich Download PDF

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Publication number
EP3046215B1
EP3046215B1 EP15151245.6A EP15151245A EP3046215B1 EP 3046215 B1 EP3046215 B1 EP 3046215B1 EP 15151245 A EP15151245 A EP 15151245A EP 3046215 B1 EP3046215 B1 EP 3046215B1
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EP
European Patent Office
Prior art keywords
batteries
stage
electric loads
control means
ups device
Prior art date
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EP15151245.6A
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English (en)
French (fr)
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EP3046215A1 (de
Inventor
Gabriele Valentino De Natale
Luciano Di Maio
Marco Testa
Andrea Ricci
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ABB Schweiz AG
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ABB Schweiz AG
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

Definitions

  • the present invention relates to an uninterruptible power supply (UPS) device for medium voltage electric installations.
  • UPS uninterruptible power supply
  • medium voltage identifies voltages higher than 1 kV AC and 1.5 kV DC up to tens of kV, e.g. up to 72 kV AC and 100 kV DC.
  • the power supply device of the invention is particularly suitable for use in outdoor MV electric installations, for example in outdoor MV switching apparatuses, such as reclosers, circuit breakers, contactors, disconnectors, or the like.
  • an outdoor MV electric installation often comprises an UPS device to provide electric power to suitable components and devices of said electric installation.
  • an UPS device is typically arranged to feed the devices included in the control cabinet.
  • the electric loads fed by the UPS device as a whole, generally require a remarkable amount of electric power that needs to be harvested from a power supply and/or from batteries.
  • US2005/0068002 A1 and US 7,816,812 B2 are disclosing UPS devices with a combination off fuel cells and secondary batteries to improve the output capabilities.
  • an object of the present invention to provide an UPS device that is capable of providing high performances in managing the feeding of the electric loads connected thereto.
  • Still another object of the present invention is to provide an UPS device that is capable of providing high performances in managing temporary emergency conditions.
  • Another object of the present invention is to provide an UPS device that has a relatively low size and electric power dissipation.
  • Another object of the present invention is to provide an UPS device that can be easily manufactured at industrial level, at competitive costs.
  • the present invention provides an UPS device for MV electric installations according to the independent claim 1 and the related dependent claims.
  • the present invention relates to an UPS device 1 for MV electric installations, such as, for example, MV switching apparatuses, switchboards, motors and the like.
  • the UPS device 1 is electrically coupleable with one or more electric loads 70.
  • the electric loads 70 may be of various types depending on the MV electric installation, in which the UPS device is arranged.
  • the electric loads 70 may comprise, for example, a protection relay 71, a radio transmitter device 72, a capacitor bank charger 73 and a power and control device 74 for driving the actuator of the switching device.
  • One or more electric loads 70 are operatively associated with one or more sensors 70B (more generally, load sensing means) configured to detect electrical quantities related to the operative status of said loads, for example the feeding currents circulating in said loads.
  • one or more electric loads 70 are capable to communicate with the UPS device 1.
  • One or more electric loads 70 are operatively associated with corresponding switches 70A configured to electrically connect or disconnect said loads with or from the UPS device 1.
  • One or more electric loads 70 may be provided with corresponding control devices 70C (more generally, load control means) comprising, for example, suitable digital signal processing devices, such as microprocessors.
  • the switches 70A, the sensors 70B and/or the control devices 70C are configured to communicate with control means 5 of the UPS device 1 and cooperate to manage the feeding of the corresponding loads.
  • the UPS device 1 In order to receive electric power to feed the electric loads 70, the UPS device 1 is electrically coupleable with a power supply 50.
  • the power supply 50 is an auxiliary power supply unit capable of deriving electric power from a main AC electric power line.
  • the UPS device 1 is advantageously configured to derive the electric power to feed the electric loads 70 from the power supply 50 in normal operative conditions, e.g. when fault or overload conditions are not present.
  • the UPS device 1 is electrically coupleable with one or more batteries 60, which may be of known type.
  • one or more sensors 70A and one more switches 70B may be included in the loads 70, e.g. integrated in suitable protection circuits.
  • one or more sensors 70A and one more switches 70B may be included in the UPS device 1, e.g. integrated in suitable protection circuits.
  • the batteries 60 are accommodated separately with respect to the UPS device 1 and are electrically connected to the UPS device 1 during installation.
  • the batteries 60 may be integrated with the UPS device 1.
  • the UPS device 1 is advantageously configured to charge the batteries 60 in normal operative conditions and feed the electrical loads 70 by means of the batteries 60 in particular operative conditions, e.g. when overload conditions are present.
  • the UPS device 1 comprises a conversion stage 2, which is electrically coupleable with the power supply 50.
  • the conversion stage 2 is adapted to receive electric power from the power supply 50 and provide a first output voltage V1 and a first output current I1,
  • the conversion stage 2 is adapted to receive a given input voltage made available by the power supply 50 and provide an adjustable output voltage V1.
  • the conversion stage 2 comprises one or more control terminals (not shown), at which it receives control signals C1,
  • the conversion stage 2 comprises an isolated DC/DC voltage converter.
  • Such a DC/DC converter may have a circuit configuration of known type.
  • it may be a flyback converter.
  • the UPS device 1 comprises a rectification stage 8 electrically coupled to the conversion stage 2 in an upstream position with respect to the normal flow of electric power from the power supply 50 to the UPS device 1.
  • the rectification stage 8 is adapted to rectify an AC voltage made available by the power supply 50.
  • the rectification stage 8 may comprise a plurality of diodes in a bridge-like configuration of known type.
  • the UPS device 1 comprises a charging stage 3, which is electrically coupled with the conversion stage 2 and is electrically coupleable with the batteries 60.
  • input terminals of the charging stage 3 are electrically connected with output terminals of the conversion stage 2 while output terminals of the charging stage 3 are electrically connected with corresponding terminals of the batteries 60.
  • the charging stage 3 is adapted to receive electric power from the conversion stage 2 and provide a charging current to the batteries 60.
  • the charging stage 3 may be of known type.
  • the charging stage 3 comprises one or more control terminals (not shown), at which it receives control signals C2.
  • the UPS device 1 comprises a switching stage 4, which has a first input terminal T1 electrically coupled with the conversion stage 2, a second input terminal T2 electrically coupled with the batteries 60 and a third output terminal T3 electrically coupled with the electric loads 70.
  • the input terminal T1 is electrically connected with the output terminals of the conversion stage 2, so that, in normal conditions, the input terminal T1 is substantially at the voltage V1 provided by the conversion stage 2.
  • the input terminal T2 is electrically connected with the terminals of the batteries 60, so that, in normal conditions, the input terminal T2 is substantially at the voltage V2 provided by the batteries 60.
  • the output terminal T3 forms an output of the UPS device 1, at which the electric loads 70 are electrically coupleable with this latter to receive a feeding voltage V3.
  • the switching stage 4 comprises a first diode circuit 41 electrically connected between with the input terminal T1 and the output terminal T3.
  • the diode circuit 41 is configured to allow the flow of a current from the conversion stage 2 to the electric loads 70, when the voltage V1 at the first input terminal T1 is higher than the feeding voltage V3 at the third output terminal T3.
  • the diode circuit 41 comprises at least one diode 410 having the anode terminal electrically connected with the terminal T1 and the cathode terminal electrically connected with the terminal T3.
  • the switching stage 4 comprises a second diode circuit 42, which is electrically connected between with the input terminal T2 and the output terminal T3.
  • the diode circuit 42 is configured to allow the flow of a current from the batteries 60 to the electric loads 70, when the voltage V2 at the second input terminal T2 is higher than the voltage V3 at the third output terminal T3.
  • the diode circuit 42 comprises at least one diode 420 having the anode terminal electrically connected with the terminal T2 and the cathode terminal electrically connected with the terminal T3.
  • the switching stage 4 is advantageously configured so that the operation of the first and second diode circuits 41, 42 can be controlled by adjusting the first output voltage V1 as a function of the second output voltage V2.
  • the switching stage 4 is configured so that the first diode circuit 41 and the second diode circuit 42 respectively allow or prevent the flow of corresponding feeding currents IF1, IF2 towards the electric loads 70 depending on the mutual relationship between the first output voltage V1 and the second output voltage V2.
  • the output voltages V1, V2 are selected sufficiently higher than a minimum feeding voltage V3 MIN (e.g. 20V), so as to always feed the electric loads 70 and bring the diodes 410, 420 in a conduction state.
  • V3 MIN e.g. 20V
  • the output voltages V1, V2 are selected so that the following conditions are always present: V 1 > V 3 MIN + VTH 1 V 2 > V 3 MIN + VTH 2 where VTH1, VTH2 are respectively the threshold voltages of the diodes 410, 420 and V3 MIN is a minimum feeding voltage to feed the electric loads 70.
  • the output voltage V1 may be adjusted so that the following conditions are obtained: V 1 > V 3 MIN + VTH 1 V 1 > V 2 + VTH 2 .
  • the first diode circuit 41 allows the flow of a first feeding current IF1 from the conversion stage 2 to the electric loads 70, as the output voltage V1 is sufficiently high to bring the corresponding diode 410 in a conduction state.
  • the voltage V3 at the terminal T3 is V3 ⁇ V1.
  • the diode circuit 42 prevents the flow of a second feeding current IF2 from the batteries 60 to the electric loads 70, as the corresponding diode 420 is immediately brought in an interdiction state (after an initial conduction period).
  • the output voltage V1 may be adjusted so that the following conditions are obtained: V 1 > V 3 MIN + VTH 1 V 1 ⁇ V 2 ⁇ VTH 1 .
  • the diode circuit 42 allows the flow of a feeding current IF2 from the batteries 60 to the electric loads 70, as the output voltage V2 is sufficiently high to bring the corresponding diode 420 in a conduction state.
  • the voltage V3 at the terminal T3 is V3 ⁇ V2.
  • the diode circuit 41 prevents the flow of a feeding current IF1 from the conversion stage 2 to the electric loads 70, as the corresponding diode 410 is immediately brought in an interdiction state (after an initial conduction period).
  • the UPS device 1 comprises control means 5 to manage the operation of the UPS device itself.
  • control means 5 can manage internal and external diagnostic activities, provide/receive control signals, communicate with external or internal devices and perform other activities requested during the operating life of the UPS device 1.
  • control means 5 are adapted to control the charging of the batteries 60 and the feeding of the electric loads 70.
  • control means 5 are adapted to generate control signals C1, C2 for driving the operation of the conversion stage 2 and of the charging stage 3.
  • control means 5 are adapted to manage the feeding of the electric loads 70 by adjusting the first output voltage V1 provided by the conversion stage 2 as a function of the second output voltage V2 provided by the batteries 60.
  • the control means 5 are in fact capable of controlling the operation of the diode circuits 41, 42, in particular alternatively activating or deactivating the diode circuits 41, 42 by alternatively bringing the corresponding diodes 410, 420 in a conduction or interdiction state.
  • control means 5 are capable of alternatively feeding the electric loads 70 by means of a feeding current IF1 provided by the conversion stage 2 or by means of a feeding current IF2 provided by the batteries 60.
  • control means 5 are adapted to communicate with one or more loads 70.
  • control means 5 are adapted to receive status signals M indicative of the operative status of the electric loads 70.
  • the status signals M may comprise sensing signals provided by the sensors 70A that are integrated or operatively associated with the loads 70.
  • the status signals M may comprise sensing signals indicative of the feeding currents provided by the UPS device 1 to the loads 70.
  • the status signals M may comprise control signals generated by the loads 70 or by the control devices 70C thereof.
  • the control means 5 may receive signals indicative of an incoming switching operation, which are sent by the power and control unit 74.
  • control means 5 may receive signals indicative of the presence of fault conditions, which are sent by the corresponding control device 70C integrated or operatively associated with said load.
  • the control means 5 are adapted to receive and process the status signals M, in particular to manage the charging of the batteries 60 and the feeding of the electric loads 70 on the base of the information provided by the status signals M.
  • control means 5 are adapted to send control signals C4 to control the operative status of the loads 70.
  • control means 5 are preferably adapted to provide control signals C4 to control the connection or disconnection of said loads with or from the UPS device 1.
  • control means 5 are preferably adapted to send control signals C4 to one or more switches 70A to control the electrical connection or disconnection of the corresponding electric loads 70 with or from the UPS device 1.
  • control means 5 are adapted to control the electrical connection or disconnection of the electric loads 70 with or from the UPS device 1 on the base of load priority data.
  • control means 5 are adapted to control the electrical connection or disconnection of the electric loads 70 with or from the UPS device 1 on the base of the information provided by the status signals M, which are sent by the electric loads 70 themselves.
  • control means 5 may send control signals C4 to one or more switches 70A to temporary disconnect one or more corresponding further loads 70 from the UPS device 1.
  • control means 5 comprise one or more main digital processing devices (e.g. one or more microprocessors) that are configured to execute software instructions for operating the UPS device 1.
  • main digital processing devices e.g. one or more microprocessors
  • the UPS device 1 comprises first sensing means S1 adapted to provide first sensing signals D1 indicative of the first output voltage V1 and the first output current I1 provided in output by the conversion stage 2.
  • the sensing means S1 may comprise one or more voltage and current sensors of known type.
  • the control means 5 are adapted to receive and process the sensing signals D1.
  • control means 5 are adapted to manage the charging of the batteries 60 and the feeding of the electric loads 70 on the base of the information provided by the sensing signals D1.
  • the UPS device 1 comprises second sensing means S2 adapted to provide second sensing signals D2 indicative of the second output voltage V2 and the second output current I2 provided by the batteries 60.
  • the sensing means S2 may comprise one or more voltage and current sensors of known type.
  • the control means 5 are adapted to receive and process the sensing signals D2.
  • control means 5 are adapted to manage the charging of the batteries 60 and the feeding of the electric loads 70 on the base of the information provided by the sensing signals D2.
  • the UPS device 1 comprises third sensing means S3 adapted to provide third sensing signals D3 indicative of the temperature of the conversion stage 2, for example of the internal temperature of the conversion stage or the temperature in the proximity of this latter.
  • the sensing means S3 may comprise one or more temperature sensors of known type.
  • the control means 5 are adapted to receive and process the sensing signals D3.
  • control means 5 are adapted to manage the charging of the batteries 60 and the feeding of the electric loads 70 on the base of the information provided by the sensing signals D3.
  • the UPS device 1 comprises fourth sensing means S4 adapted to provide fourth sensing signals D4 indicative of the temperature of the charging stage 3, for example of the internal temperature of the charging stage or the temperature in the proximity of this latter.
  • the sensing means S4 may comprise one or more temperature sensors of known type.
  • the control means 5 are adapted to receive and process the sensing signals D4.
  • control means 5 are adapted to manage the charging of the batteries 60 and the feeding of the electric loads 70 on the base of the information provided by the sensing signals D4.
  • control means 5 are adapted to receive fifth sensing signals D5 indicative of the temperature of the batteries 60, for example of the internal temperature of the charging stage or the temperature in the proximity of this latter.
  • the sensing signals D5 are provided by sensing means S5, which may comprise one or more temperature sensors of known type.
  • the sensing means S5 may be comprised in the UPS device 1 or integrated with the batteries 60 (e.g. when these latter are not comprised in the UPS device 1).
  • the control means 5 are adapted to process the sensing signals D5.
  • control means 5 are adapted to manage the charging of the batteries 60 and the feeding of the electric loads 70 on the base of the information provided by the sensing signals D5.
  • the UPS device 1 may be further provided with additional sensing means for diagnostic purposes.
  • the UPS device 1 may comprise sixth sensing means S6 adapted to provide first sensing signals D6 indicative of the feeding voltage V3, which is provided in output by the UPS device 1 to the electric loads 70.
  • the sensing means S6 may comprise one or more voltage sensors of known type.
  • the control means 5 are adapted to receive and process the sensing signals D6 for diagnostic purposes and/or managing the charging of the batteries 60 and the feeding of the electric loads 70.
  • the UPS device 1 comprises a disconnection stage 6, which is electrically coupled with the batteries 60 and the electric loads 70.
  • the UPS device 1 comprises at least one switch 610 (e.g. a MOSFET) electrically connected in series with the batteries 60, the switching stage 4, in particular the diode circuit 42, and the electric loads 70.
  • switch 610 e.g. a MOSFET
  • the disconnection stage 6 is electrically connected between the second input terminal T2 of the switching stage 4 and the terminals of the batteries 60.
  • the disconnection stage 6 is adapted to electrically connect or disconnect the batteries 60 with or from the electric loads 70.
  • the switch 610 of the disconnection stage 6 is advantageously configured so as to allow or prevent the flow of a current between the batteries 60 and the loads 70, upon receiving suitable control signals C3.
  • control means 5 are adapted to control the operation of the disconnection stage 6, e.g. by providing the control signals C3 to the switch 610.
  • control means 5 are adapted to control the operation of the disconnection stage 6 on the base of the information provided by the fifth sensing signals D5 indicative of the temperature of the batteries 60.
  • the operation of the UPS device 1 are now described referring to some relevant operating conditions.
  • control means 5 In normal conditions, e.g. when overload conditions or fault conditions are not determined, the control means 5:
  • control means 5 determine over-heating or over-loading conditions for the conversion stage 2 on the base of the sensing signals D3 and D1
  • the control means 5 provide control signals C2 to the charging stage 3 in order to switch off said charging stage for a given period of time, reducing the overall load supplied by the conversion stage 2.
  • control means 5 provide control signals C1 to the conversion stage 2 in order to switch off said conversion stage for a given period of time.
  • the feeding of the electric load 70 is ensured by the batteries 60.
  • the diode circuit 42 allows the flow of a feeding current IF2 from the batteries 60 to the electric loads 70, even if the output voltage V1 was initially set higher than the output voltage V2, as no currents flow along the first diode circuit 41 anymore and the output voltage V2 is sufficiently high to automatically bring the diode 420 in a conduction state (V2>V3 MIN +VTH2).
  • the control means 5 provide control signals C2 to the charging stage 3 to switch off said charging stage for a given period of time.
  • control means 5 Preferably, if they determine over-heating or over-cooling conditions for the batteries 60 on the base of the sensing signals D5, the control means 5:
  • over-heating or over-cooling conditions of the batteries 60 may occur when the temperature of the batteries is out of a given range including a normal operative temperature, e.g. 30°C.
  • control means 5 Preferably, if they determine over-loading conditions for one or more first loads on the base of the sensing signals D1 and/or on the base of the status signals M, the control means 5:
  • control means 5 Preferably, if they determine fault conditions for one or more loads on the base of the status signals M, the control means 5 provide control signals C4 to electrically disconnect said loads from the UPS device 1.
  • control means 5 provide control signals C4 to electrically connect or disconnect said loads with or from the UPS device 1, according to predetermined test sequences, e.g. on the base of the load priority data.
  • the control means 5 may then determine the consumption of the electric loads 70 on the base of the status signals M received from said loads.
  • control means 5 provide control signals C1 to adjust the output voltage V1 so that it is lower than the output voltage V2 provided by the batteries 60 (the electric loads 70 are therefore fed by the batteries 60 only) for a given period of time.
  • the control means 5 may then determine the operative status of the batteries 60 on the base of the sensing signals D5 received from the sensing means S5.
  • the diode circuit 41 allows the flow of a feeding current IF1 from the conversion stage 2 to the electric loads 70, even if the output voltage V1 was set lower than the output voltage V2, as no currents flow along the second diode circuit 42 anymore and the output voltage V1 is sufficiently high (V1>V3 MIN +VTH1) to automatically bring the diode 410 in a conduction state.
  • control means 5 are adapted to communicate with remote devices (e.g. a remote computerised unit) to exchange data and/or control signals R.
  • remote devices e.g. a remote computerised unit
  • control means 5 comprises an interface 51, which is operatively connectable (in a wired or wireless manner) with a communication module (e.g. including an USP port or including a slot for insertion of a SD card) to receive one or more configuration parameters R (e.g. charging values of the batteries 60, temperature threshold values, voltage threshold values, current threshold values, and the like) from said communication module.
  • a communication module e.g. including an USP port or including a slot for insertion of a SD card
  • configuration parameters R e.g. charging values of the batteries 60, temperature threshold values, voltage threshold values, current threshold values, and the like
  • the UPS device 1, according to the present invention provides remarkable advantages with respect to the solutions of the state of the art.
  • the UPS device 1 provides reliable and improved performances in managing the electric loads 70 electrically coupled thereof.
  • the UPS device 1 allows managing the feeding of the electric loads 70 in a very flexible and versatile manner both in normal and in emergency conditions.
  • the UPS device is capable of highly efficiently managing the feeding of the electric loads 70 when of overload conditions or fault conditions are present.
  • the UPS device 1 allows performing advanced diagnostics procedures on the batteries 60 and on the electric loads 70.
  • the UPS device 1 provides relevant advantages in terms of power consumption and size reduction.
  • a single conversion stage 2 which, thanks to the smart functionalities that can be easily carried out by the control means 5, may be designed to provide the average electric power request by electric loads 70 (and not the peak electric power request as it occurs in traditional UPS devices).
  • the UPS device 1 is particularly suitable for use in outdoor MV electric installations (e.g. in outdoor MV switching apparatuses).
  • the UPS device 1 is easy and cheap to manufacture at industrial levels with respect to the solutions currently available in the state of the art.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Claims (9)

  1. USV-Vorrichtung (1) für MS-Elektroinstallationen, wobei die USV-Vorrichtung elektrisch mit einer Stromversorgung (50) koppelbar ist, mit einer oder mehreren Batterien (60) und mit einer oder mehreren elektrischen Lasten (70), umfassend:
    - eine Wandelstufe (2), die elektrisch mit der Stromversorgung (50) koppelbar ist, wobei die Wandelstufe (2) ausgelegt ist, elektrische Leistung von der Stromversorgung (50) zu empfangen und eine einstellbare erste Ausgangsspannung (V1) bereitzustellen;
    - eine Ladestufe (3), die elektrisch mit der Wandelstufe (2) gekoppelt ist und elektrisch mit den Batterien (60) koppelbar ist, wobei die Ladestufe (3) ausgelegt ist, elektrische Leistung von der Wandelstufe (2) zu empfangen und einen Ladestrom an die Batterien (60) bereitzustellen;
    - eine Schaltstufe (4), die einen ersten Eingangsanschluss (T1) aufweist, der elektrisch mit der Wandelstufe (2) gekoppelt ist, einen zweiten Eingangsanschluss (T2), der elektrisch mit den Batterien (60) koppelbar ist, und einen dritten Ausgangsanschluss (T3), der elektrisch mit den elektrischen Lasten gekoppelt ist, wobei die Schaltstufe (4) umfasst:
    - eine erste Diodenschaltung (41), die elektrisch mit dem ersten Eingangsanschluss (T1) und dem dritten Ausgangsanschluss (T3) verbunden ist, wobei die erste Diodenschaltung (41) derart konfiguriert ist, dass sie den Fluss eines ersten Zuführstroms (IF1) von der Wandelstufe (2) zu den elektrischen Lasten (70) erlaubt, wenn die Spannung (V1) an dem ersten Eingangsanschluss (T1) höher ist als eine Spannung (V3) an dem dritten Ausgangsanschluss (T3);
    - eine zweite Diodenschaltung (42), die elektrisch mit dem zweiten Eingangsanschluss (T2) und dem dritten Ausgangsanschluss (T3) verbunden ist, wobei die zweite Diodenschaltung (42) derart konfiguriert ist, dass sie den Fluss eines zweiten Zuführstroms (IF2) von den Batterien (60) zu den elektrischen Lasten (70) erlaubt, wenn die Spannung (V2) an dem zweiten Eingangsanschluss (T2) höher ist als die Spannung (V3) an dem dritten Ausgangsanschluss (T3);
    - Steuermittel (5), die ausgelegt sind, das Laden der Batterien (60) und das Zuführen der elektrischen Lasten (70) zu steuern, wobei die Steuermittel (5) dafür ausgelegt sind, das Zuführen der elektrischen Lasten (70) durch Einstellen der ersten Ausgangsspannung (V1) an dem ersten Eingangsanschluss (T1), die von der Wandelstufe (2) bereitgestellt wird, als eine Funktion der zweiten Ausgangsspannung (V2) an dem ersten Eingangsanschluss (T2), der von den Batterien (60) bereitgestellt wird, zu verwalten;
    dadurch gekennzeichnet, dass es eine Trennstufe (6) umfasst, die elektrisch mit den Batterien (60) und den elektrischen Lasten (70) koppelbar ist, wobei die Trennstufe (6) dafür ausgelegt ist, die Batterien (60) elektrisch mit/von den elektrischen Lasten (70) zu verbinden/zu trennen,
    wobei die Steuermittel (5) ausgelegt sind, fünfte Sensorsignale (D5) zu empfangen, die für Temperatur der Batterien (60) indikativ sind;
    wobei die Steuermittel (5) ausgelegt sind, Steuersignale (C2) an das Laden (3) bereitzustellen, um die Ladestufe (3) für einen gegebenen Zeitraum auszuschalten, und Steuersignale (C3) an die Trennstufe (6), um die Batterien (60) von den elektrischen Lasten (70) zu trennen, um die Trennstufe (6) für einen gegebenen Zeitraum auszuschalten, wenn die Steuermittel (5) Überhitzen oder Überkühlen der Batterien (60) basierend auf den fünften Sensorsignalen (D5) bestimmen.
  2. USV-Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie umfasst:
    - erste Sensormittel (S1), die ausgelegt sind, erste Sensorsignale (D1) bereitzustellen, die indikativ für die erste Ausgangsspannung (V1) und einen ersten Ausgangsstrom (I1) sind, die von der Wandelstufe bereitgestellt werden;
    - zweite Sensormittel (S2), die ausgelegt sind, zweite Sensorsignale (D2) bereitzustellen, die indikativ für eine zweite Ausgangsspannung (V2) und einen zweiten Ausgangsstrom (I2) sind, die von den Batterien bereitgestellt werden;
    wobei die Steuermittel ausgelegt sind, die ersten und zweiten Sensorsignale von den ersten und zweiten Sensormitteln zu empfangen und das Laden der Batterien und das Zuführen der elektrischen Lasten basierend auf den Informationen, die von den ersten und zweiten Sensorsignalen bereitgestellt werden, zu verwalten.
  3. USV-Vorrichtung gemäß einem oder mehreren der vorstehenden Ansprüchen, dadurch gekennzeichnet, dass sie dritte Sensormittel (S3) umfasst, die ausgelegt sind, dritte Sensorsignale (D3) bereitzustellen, die indikativ für eine Temperatur der Wandelstufe sind, wobei die Steuermittel ausgelegt sind, die dritten Sensorsignale von den dritten Sensormitteln zu empfangen, und das Laden der Batterien und das Zuführen der elektrischen Lasten basierend auf den Informationen zu verwalten, die von den dritten Sensorsignalen bereitgestellt werden.
  4. USV-Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sie vierte Sensormittel (S4) umfasst, die ausgelegt sind, vierte Sensorsignale (D4) bereitzustellen, die indikativ für eine Temperatur der Ladestufe sind, wobei die Steuermittel ausgelegt sind, die vierten Sensorsignale von den vierten Sensormitteln zu empfangen und das Laden der Batterien und das Zuführen der elektrischen Lasten basierend auf den Informationen zu verwalten, die von den vierten Sensorsignalen bereitgestellt werden.
  5. USV-Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Steuermittel ausgelegt sind, Zustandssignale (M) zu empfangen, die indikativ für den Betriebszustand der elektrischen Lasten sind, und das Laden der Batterien und das Zuführen der elektrischen Lasten basierend auf den Informationen zu verwalten, die von den Überwachungssignalen bereitgestellt werden, zu verwalten.
  6. USV-Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Steuermittel ausgelegt sind, die elektrische Verbindung/Trennung der elektrischen Lasten mit/von der USV-Vorrichtung basierend auf den Informationen zu steuern, die von den Zustandssignalen bereitgestellt werden.
  7. USV-Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Steuermittel ausgelegt sind, eine elektrische Verbindung/Trennung der elektrischen Lasten mit/von der USV-Vorrichtung basierend auf Lastprioritätsdaten zu steuern.
  8. MS-Elektroinstallation, dadurch gekennzeichnet, dass sie eine USV-Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche umfasst.
  9. MS-Elektroinstallation nach Anspruch 8, dadurch gekennzeichnet, dass sie eine MS-Elektroinstallation im Außenbereich ist.
EP15151245.6A 2015-01-15 2015-01-15 Vorrichtung zur unterbrechungsfreien Stromversorgung für elektrische Mittelspannungsinstallationen im Außenbereich Active EP3046215B1 (de)

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JP2000116029A (ja) * 1998-10-02 2000-04-21 Fujitsu Denso Ltd バックアップ電源装置
JP2005078925A (ja) * 2003-08-29 2005-03-24 Toshiba Corp 電池ユニットおよび給電制御方法
JP5167645B2 (ja) * 2007-01-30 2013-03-21 富士通株式会社 電子機器および直流電圧変換システム
JP2011125124A (ja) * 2009-12-09 2011-06-23 Sanyo Electric Co Ltd サーバーとサーバーに収納される無停電電源装置
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